// 操作共享变量会有问题的售票系统代码
#include <stdio.h>
#include <iostream>
#include <string>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include "Mutex.hpp"

using namespace MutexModule;

int ticket = 100;

class ThreadData
{
public:
    ThreadData(const std::string &n, Mutex &lock)
        : name(n), lockp(&lock)
    {
    }
    ~ThreadData()
    {
    }
    std::string name;
    Mutex *lockp;
};

void *route(void *arg)
{
    ThreadData *td = static_cast<ThreadData*> (arg);

    while (1)
    {
        //加锁
        //pthread_mutex_lock(td->lockp);
        td->lockp->Lock();
        if (ticket > 0) // 1. 判断
        {
            usleep(1000);                               // 模拟抢票花的时间
            printf("%s sells ticket:%d\n", td->name.c_str(), ticket); // 2. 抢到了票
            ticket--;                                   // 3. 票数--
            //pthread_mutex_unlock(td->lockp);
            td->lockp->Unlock();
        }
        else
        {
            td->lockp->Unlock();
            //pthread_mutex_unlock(td->lockp);
            break;
        }
    }
    return nullptr;
}

int main(void)
{
    // pthread_mutex_t lock;
    // pthread_mutex_init(&lock, nullptr);//初始化锁

    Mutex lock;

    pthread_t t1, t2, t3, t4;

    ThreadData *td1 = new ThreadData("thread 1", lock);
    pthread_create(&t1, NULL, route, td1);
    ThreadData *td2 = new ThreadData("thread 2", lock);
    pthread_create(&t1, NULL, route, td2);
    ThreadData *td3 = new ThreadData("thread 3", lock);
    pthread_create(&t1, NULL, route, td3);
    ThreadData *td4 = new ThreadData("thread 4", lock);
    pthread_create(&t1, NULL, route, td4);

    pthread_join(t1, NULL);
    pthread_join(t2, NULL);
    pthread_join(t3, NULL);
    pthread_join(t4, NULL);

    // pthread_mutex_destroy(&lock);

    return 0;
}